Fuel supply apparatus for internal combustion engines



C. F. L. KING.

FUEL SUPPLY APPARATUS FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED WM 5, 1918.

1,820,240 IIIIQIII-Qd Out. as, 1919.

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eraser ornate.

EHARLES F. L. KING, OF EDGBARTON, BIRMINGHAM, ENGLAND.

FUEL-SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES.

To all whom it may concern:

. Be it known that l, CHARLES Fnuonnu'it Inuvnntvcn Kins, a subject of the King of (treat Britain. residing at 138 Bristol road, Edgbarton, Birmingham, England. have invented certain new and useful Improvements in Fuel-Supply Apparatus for Inter nal-Ccmilmstion Engines, of which the following is a specification.

This invention relates to fuel-supply apparatus for internal combustion engines of motor vehicles and the like, said apparatus being of that type in which a low-level supply tank is employed from which liquid fuel is raised by suction into an auxiliary receptacle from which it flows by gravity through a discharge branch or outlet controlled by a flap valve into a chamber open to the atmosphere and communicating with the carburetor.

The present invention concerns the flap valve which controls the discharge branch or outlet. One of the objects of the invention is to provide an improved valve which will enable the receptacle to be more nearly completely emptied than with the ordinary form of valve; while another object is to prevent particles of dirt or solid matter from interfering with the proper operation of the valve.

According to the said invention the flap valve is provided upon its inner or rear face with an upstanding or projecting part which seats itself upon the opposed flat face of the end of the discharge branch or outlet.

Figure 1 of the. accompanying drawings is a section through a vacuum fuel-feed apparatus having a discharge valve made according to this invention.

Fig. is an elevation of the inside face of the val vc.

Fig. 3 shows the \ttl\'% separated.

Fig". 4 represents a'modification.

la the apparatus shown in Fig. 1, the fuel is raised from a low-level storage tank into the receptacle 1 by suction. an aperture 2 in the cover 3 of the said receptacle being 'in communication with the intake manifold of the engine or other source of suction. The said aperture 2 is controlled by a valve 4 :'.-'.1\l the air inlet 5 is controlled by a valve 6, the stems of both valves being connected to a lever 7 jointcd to a guide rod 8 upon Specification of Letters Patent.

Patented Oct. 28, 1919.

1918. Serial No. 238.372.

which the float 9 can rise and fall between stops- \Vhen the receptacle 1 is full the suction,

valve 4 closes and the air valve 6 opens, the

fuel being discharged past the flap valve 10 bottom of the receptacle 1. The lower end of the valve is slotted at 16 to engage a pin 17 upon the face 14. According to the present ini 'cntion the valve is provided upon its inner face with a projecting annular rib or flange 18 which seats itself upon the said 4 face 14. of the discharge branch 15, as shown. By this means the rear face of the valve which is outside this annular rib is subjected to atmospheric pressure in addition to the front face, so that the resistance to opening under the influence of the head of liquid which is being discharged from the receptacle is considerably less than when an ordinary form of flap valve is employed. Consequently the amount of fuel remaining in .the receptacle when the valve 10 closes is lessjsaid receptacle being practically entirely emptied owing to the small head of liquid required to open the valve. The discharge, of course, only takes place when the suction valve 4 is closed and the air valve 6 is opened. When the interior of the receptacle 1 is opened to suction and the air valve closed, the flap valve 10 does not open and no liquid passes into the outer vessel 11.

Not only does the provision of the annular rib 18 insure the more complete discharge of the fuel from the receptacle, but it prevents dirt or solid particles from interfcring with the proper working of the valve.

As shown in Fig. 4, the valve 10 may have a solid circular raised part 18 upon its inner face, instead of a rib or flange.

It is understood that the means for controlling the suction and air apertures of the receptacle torn no part of the present invention, and may be of any suitable or known construction, the particular construction, shown being claimed in my copending application Serial No. 238,370, filed June 5, 1918.

Having fully described my invention, \vh at I desire to claim and secure by Letters Patent is 1. In fuel-supply apparatus; the combination with a low-level tank, of an auxiliary receptacle into which fuel can be raised by suction. and having a discharge orifice, a flat valve-seating around said orifice, and a flap valve which control the discharge orifice and which is provided upon its inner or rear face With an annular upstanding rib adapted to engage the fiat valve-seating.

2. In fuel-supply apparatus; the combination With a low-level tank, of an auxiliary receptacle into Which fuel canhe raised by suction, a depending discharge branch from said receptacle having a lateral orifice, a valve-seating around said orifice, a flap valve controlling said orifice, guide pins for the said valve, and a projecting part upon the inner face of the valve which engages the said seating so that the ren'iainder of said inner face is subjected to atmospheric pressure.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses. v

. C. F. L. KING, "Witnesses H. O. PRA'rr, H. N. Mnnlm'rr. 

